CN213606819U

CN213606819U - Spiral bone cement injector suitable for conventional syringe

Info

Publication number: CN213606819U
Application number: CN202022336322.7U
Authority: CN
Inventors: 王鑫; 徐顺利
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-07-06
Anticipated expiration: 2030-10-20

Abstract

The utility model provides a spiral bone cement pushes away notes ware suitable for conventional syringe, which comprises a sleeve, telescopic front end is equipped with the connector, telescopic end is equipped with the sleeve handle, the sleeve is equipped with the holding tank that supplies the syringe handle embedding on hand, install the adapter sleeve on hand, the adapter sleeve includes connect buckle and pushes the cover, connect buckle is opening T-slot down, the length direction perpendicular to sleeve axis in T-slot, connect buckle card is on the sleeve handle, it is coaxial and the intercommunication with the sleeve to push the cover, push and install the push rod fixed column in the cover, it has the internal thread to push the cover, be equipped with the external screw thread on the push rod fixed column, the push rod fixed column includes the fixed cover of first fixed cover and the second of split junction, form the chamber that holds that supplies the piston push rod of syringe and the embedding of piston handle. The utility model discloses pressure is balanced when guaranteeing bone cement and filling, increases push rod intensity simultaneously, prevents to inject the deformation of a time blank section of thick bamboo to can used repeatedly, the cost is lower.

Description

Spiral bone cement injector suitable for conventional syringe

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a spiral bone cement injector suitable for a conventional injector.

Background

PVP, percutaneous vertebroplasty, is a widely accepted surgical procedure for the treatment of osteoporotic vertebral fractures. However, the biggest risk of the operation is that bone cement leaks and compresses spinal cord and nerve root to cause corresponding complications, and relevant factors are fracture cracks of the vertebral body and the existence of blood vessel channels, and uneven dispersion of the bone cement is caused by uneven pressure during bone cement perfusion.

The syringe for bone cement infusion, which is initially used in a conventional syringe, as shown in fig. 1, includes an empty cylinder 20, a nipple 10 and a syringe handle 30 fixed to front and rear ends of the empty cylinder 20, respectively, and a piston guidingly installed in the empty cylinder 20, the piston including a piston rod 40 and a piston head and a piston handle 50 located at front and rear ends of the piston rod. However, the conventional injector completely depends on the self feeling of an operator when in use, the pressure is difficult to control, and especially the difference of the flow modulus during the bone cement blending period is large, and the conventional injector cannot be controlled by the hand feeling alone. In addition, the push rod of the injector has weak strength and can not be pushed after the bone cement dough is kneaded.

The spiral injector can effectively control the injection amount by injecting slowly in multiple times under the X-ray monitoring, so that the research on the spiral injector is more at present, but the existing product has a disposable design structure and cannot be reused, and huge economic burden is caused to patients.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the prior art, the utility model provides a spiral bone cement injector suitable for conventional injector, the technical scheme adopted is that the injector comprises a sleeve for being sleeved outside an injector hollow cylinder, the front end of the sleeve is provided with a connector for being connected with an injector nipple, the tail end of the sleeve is provided with a sleeve handle, the sleeve handle is provided with a holding tank for embedding the injector handle, the sleeve handle is provided with a connecting sleeve, the connecting sleeve comprises a connecting buckle and an injection sleeve which are fixed together, the connecting buckle is a T-shaped groove with a downward opening, the length direction of the T-shaped groove is vertical to the axis of the sleeve, the connecting buckle is clamped on the sleeve handle, the injection sleeve is coaxial and communicated with the sleeve, the injection sleeve is provided with a push rod fixing column, the injection sleeve is provided with an internal thread, the push rod fixing column is provided with an external thread meshed with the internal thread of the injection sleeve, the push rod, the first fixing sleeve and the second fixing sleeve are fixed to form an accommodating cavity for embedding a piston push rod and a piston handle of the injector.

Preferably, a transparent observation window is arranged on the side wall of the sleeve.

Preferably, the connector has an internally threaded hole.

Preferably, the first fixing sleeve and the second fixing sleeve are respectively provided with a strip-shaped groove for clamping a cylindrical bar on the side surface of the piston push rod and a semicircular groove for clamping a piston handle.

Preferably, the first fixing sleeve is provided with a mounting groove, the second fixing sleeve is provided with a lug inserted into the mounting groove, and the lug is fixed together through a screw after being inserted into the mounting groove.

The utility model has the advantages that: the utility model discloses a spiral bone cement pushes away annotates ware can embolia the use with conventional syringe, can control the injection volume through helicitic texture, and pressure is balanced when guaranteeing bone cement and filling, increases push rod intensity simultaneously, prevents to push the deformation of time blank section of thick bamboo, avoids the unable propulsive problem again after the bone cement dough period to can used repeatedly, the cost is lower.

Drawings

FIG. 1 is a schematic structural diagram of a conventional syringe;

FIG. 2 is a schematic structural view of the rotary bone cement injector of the present invention;

FIG. 3 is a top view of the sleeve handle;

FIG. 4 is a front view of the sleeve portion;

fig. 5 is a side view of the connection sleeve;

FIG. 6 is a schematic view showing a detached state of the push rod fixing post;

in the figure: 10-nipple, 20-hollow cylinder, 30-syringe handle, 40-piston push rod, 50-piston handle, 1-connector, 2-sleeve, 3-observation window, 4-sleeve handle, 401-accommodating groove, 5-connecting buckle, 6-pushing injection sleeve, 7-push rod fixing column, 701-first fixing sleeve and 702-second fixing sleeve.

Detailed Description

The technical solution of the present invention will be described in detail by the following specific examples.

As shown in fig. 2 to fig. 6, the spiral bone cement injector of the present invention comprises a sleeve 2 for being sleeved outside an empty syringe barrel 20, the front end of the sleeve 2 is provided with a connector 1 for being connected with a syringe nipple 10, the end of the sleeve 2 is provided with a sleeve handle 4, the sleeve handle 4 is provided with a holding groove 401 for embedding the syringe handle 30, the sleeve handle 4 is provided with a connecting sleeve, the connecting sleeve comprises a connecting buckle 5 and an injecting sleeve 6 which are fixed together, the connecting buckle 5 is a T-shaped groove with a downward opening, the length direction of the T-shaped groove is perpendicular to the axis of the sleeve 2, the connecting buckle 5 is clamped on the sleeve handle 4, the sleeve 2 is located in the opening of the T-shaped groove, the injecting sleeve 6 is coaxial and communicated with the sleeve 2, the injecting sleeve 6 is provided with a push rod fixing column 7, the injecting sleeve 6 has an internal thread, the push rod fixing column 7, the push rod fixing post 7 comprises a first fixing sleeve 701 and a second fixing sleeve 702 which are connected in a split mode, and an accommodating cavity for embedding the piston push rod 40 and the piston handle 50 of the injector is formed after the first fixing sleeve 701 and the second fixing sleeve 702 are fixed.

Preferably, a transparent observation window 3 is arranged on the side wall of the sleeve 2.

Preferably, the connector 1 has an internally threaded hole.

Preferably, the first fixing sleeve 701 and the second fixing sleeve 702 are both provided with a strip-shaped groove for clamping a cylindrical bar on the side of the piston push rod 40 and a semi-circular groove for clamping the piston handle 50.

Preferably, the first fixing sleeve 701 is provided with a mounting groove, the second fixing sleeve 702 is provided with a projection inserted into the mounting groove, the projection is specifically of a quadrangular prism structure, and the projection is fixed together by a screw after being inserted into the mounting groove.

In the embodiment, the connector 1 is an internal spiral head, can be screwed and connected with the tail end of a common PVP puncture needle, cannot be loosened, and is firmly connected with the puncture needle through a syringe nipple. The inner diameter of the sleeve 2 corresponds to the outer diameters of the empty cylinders of 1ml and 5ml syringes, the difference is 0.5mm, and the sleeve is sleeved outside the empty cylinder of the syringe to prevent the deformation of the empty cylinder during pushing. The observation window 3 is positioned on the side wall of the sleeve, and the bolus injection of the bone cement can be observed. The sleeve handle 4 and the sleeve 2 are designed integrally, and the T-shaped groove is matched with the tail end of the empty syringe barrel in shape. The barrel connecting buckle 5 and the injection sleeve 6 are integrally designed and can be clamped on the sleeve handle 4. The inner wall of the pushing sleeve 6 is provided with long inclined threads, and the push rod fixing column 7 rotates for a circle to move forwards for a specific distance.

When in use, the conventional injector is arranged in the spiral bone cement injector, the push rod fixing column 7 is rotated to drive the injector push rod 40 to move forwards, and bone cement to be injected in the injector in the sleeve 2 is injected into an operation part through the puncture needle by the connector under the action of the push rod.

Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge range of those skilled in the art, and modifications or variations without creative efforts are still within the scope of the present invention.

Claims

1. The utility model provides a spiral bone cement injector suitable for conventional syringe which characterized in that: including being used for the cover to overlap the sleeve outside the empty section of thick bamboo of syringe, telescopic front end is equipped with the connector that is used for being connected with the syringe nipple, telescopic end is equipped with the sleeve handle, the sleeve is equipped with the holding tank that supplies the embedding of syringe handle on hand, install the adapter sleeve on hand, the adapter sleeve is including fixed connection buckle together and push the cover, connection buckle is opening T-slot down, the length direction perpendicular to sleeve axis in T-slot, connection buckle card is on hand at the sleeve, it is coaxial and the intercommunication with the sleeve to push the cover, push and install the push rod fixed column in the cover, it has the internal thread to push the cover, be equipped with the external screw thread with the internal thread engagement who pushes the cover on the push rod fixed column, the push rod fixed cover is including first fixed cover and the fixed cover of components of a whole that can function independently connection, first fixed cover and.

2. The screw-type bone cement injector according to claim 1, characterized in that: and a transparent observation window is arranged on the side wall of the sleeve.

3. The screw-type bone cement injector according to claim 1, characterized in that: the connector is provided with an internal thread hole.

4. The screw-type bone cement injector according to claim 1, characterized in that: the first fixing sleeve and the second fixing sleeve are respectively provided with a strip-shaped groove for clamping a cylindrical bar on the side surface of the piston push rod and a semicircular groove for clamping a piston handle.

5. The screw-type bone cement injector according to claim 1 or 4, characterized in that: the first fixing sleeve is provided with a mounting groove, the second fixing sleeve is provided with a lug which is inserted into the mounting groove, and the lug is fixed together through a screw after being inserted into the mounting groove.